Notes. Each star is identified by its HD or HDE number. N_m is the number of measurements of the mean magnetic field modulus from which its average ⟨ B ⟩ _av is computed. For stars for which a full rotation cycle has not yet been observed, the latter appears in italics, as does the ratio q between the highest and lowest value of ⟨ B ⟩. The σ_B is the estimated uncertainty of the ⟨ B ⟩ measurements (see Sect. 3.1 for details). N_z is the number of measurements from which the rms longitudinal field ⟨ B_z ⟩ _rms is computed, and r is the ratio of the extrema of ⟨ B_z ⟩ (defined in Sect. 5.2); the value of r is given only for those stars for which ⟨ B_z ⟩ measurements have been obtained throughout a full rotation cycle. Values of ⟨ B_z ⟩ _rms and r computed from mean longitudinal field measurements from the literature (rather than from this paper and from Paper I) appear in italics. N_q is the number of measurements of the mean quadratic field from which its average ⟨ B_q ⟩ _av is computed; p is the ratio between the extrema of ⟨ B_q ⟩, which is given only for stars for which ⟨ B_q ⟩ determinations have been obtained throughout a full rotation cycle.